The secrets act (engelsk)

Pearl and Ellen are recruited to work at code-cracking HQ, Bletchley Park, during World War Two. When the girls stumble across a sinister plot which threatens the very soul of the war effort, their budding friendship is put to the test - especially when their hearts are on the line. Who can they really trust, who can they afford to fall for, and can they solve the greatest puzzle of their lives before it's too late?